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no_long_mode:
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no_long_mode:
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1:
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1:
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	jmp 1b
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	jmp 1b
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# Protected 16-bit. We want to reuse the code-seg descriptor,
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# Protected 32-bit. We want to reuse the code-seg descriptor,
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# the Default operand size must not be 1 when entering long mode
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# the Default operand size must not be 1 when entering long mode
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.code32
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now_in_prot:
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now_in_prot:
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	# Set up stack & data descriptors
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	# Set up stack & data descriptors
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	movw $gdtselector(KDATA_DES), %ax
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	movw $gdtselector(KDATA_DES), %ax
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	movw %ax, %ds
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	movw %ax, %ds
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	movw %ax, %fs
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	movw %ax, %gs
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	movw %ax, %ss
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	movw %ax, %ss
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	movb $0xd1, %al		# enable A20 using the keyboard controller
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	movb $0xd1, %al		# enable A20 using the keyboard controller
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	outb %al, $0x64
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	outb %al, $0x64
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	movb $0xdf, %al
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	movb $0xdf, %al
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.global gdtr_inst
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.global gdtr_inst
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bsp_bootstrap_gdtr:
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bsp_bootstrap_gdtr:
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	.word gdtselector(GDT_ITEMS)
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	.word gdtselector(GDT_ITEMS)
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	.long KA2PA(gdt)-BOOT_OFFSET
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	.long KA2PA(gdt)-BOOT_OFFSET
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.global ap_bootstrap_gdtr
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ap_bootstrap_gdtr:
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	.word gdtselector(GDT_ITEMS)
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	.long KA2PA(gdt)-BOOT_OFFSET
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